It's been just over ten years since the first modern-day country legalized gay marriage, and since then only nine more across the globe have allowed lesbian, gay, bisexual and transgender (LGBT) couples to wed nationally.
On Wednesday, President Obama voiced his support for same-sex marriage. Six states perform same-sex marriages in the United States, however the nation itself does not recognize it.
Several other countries afford some rights or protections in the form of civil unions or registered partnerships, including Denmark, the UK, and Brazil.
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Can you guess which countries have fully legalized gay marriage? Find out in the slideshow below.